Wepster

Try an oil sprayer, and there are spray cans of cooking oil that do not have silicone in them. We have had oil sprayers for cooking, honestly not fond of them, also saw someplace some water in with the oil helps breakup the spray pattern so it is more even. Experiment with sprayers (even try sprayers used for misting plants, or spraying cleaner) on paper or cardboard, see the pattern. https://www.amazon.com/s?k=oil+sprayer+for+cooking&crid=1AAB87KJ7GXUH&sprefix=oil+spra%2Caps%2C117&ref=nb_sb_ss_w_hit-vc-lth_oil-sprayer-for-cooking_k0_1_8

Not much help I know, but I assume you search the used book sites every few days? Goodwill online? Seaching by ISBN would probably be quicker, if it has one (may not). You have probably seeked out any boot maker and cordwain forums. I wish you luck. There used to be a nation wide Craigslist search, don't know if it still exists, a retiring or estate of a maker may have one.

Not even remotely appropriate to work being presented. Or anything else relating to leather or craftsmanship. I have to stop here or I will type something ungodly that I will regret.

Smaller pieces like a belt end, try a japanese plane, they are set up to pull.

https://en.wikipedia.org/wiki/Lacquer_thinner AKA cellulose thinner

@SUP just saw this at my favorite woodworking store, thought of you.... https://www.leevalley.com/en-us/shop/tools/hand-tools/files-and-rasps/files/102212-japanese-milled-tooth-extra-fine-edge-plane-makers-float?item=62W3098

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excellent idea, like bow ties in wood working

These are small, low power, variable speed. Safer? Tough call, but you can slow it way down so it wont be as violent. But perhaps quicker than by hand.. https://www.amazon.com/OPAVIOC-Jewelry-Polisher-Adjustable-Polishing/dp/B09MNB2VJH/ref=asc_df_B09MNB2VJH?tag=bngsmtphsnus-20&linkCode=df0&hvadid=80676783972125&hvnetw=s&hvqmt=e&hvbmt=be&hvdev=c&hvlocint=&hvlocphy=&hvtargid=pla-4584276312388278&psc=1 Wet/dry "sandpaper" here is an inexpensive pack with the finer grits you will not find at a big box store. Automotive finishes stores have finer grits, parts stores have some https://www.amazon.com/gp/product/B08JJ39YX8/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

you might want to try here https://www.hanessupply.com/home and https://www.mcmaster.com/products/webbing-hardware/inside-length~4/

@SUP Just saw this thought it might provide some insight

Does anyone other than me wonder if this post is a legit inquiry?

The bearing on the shaft looks fine it the pic. just behind the the little protruding screw that the notch in wheel fits over. Did you fit the wheel notch over that?

I would guess larger wheels are the key, this may give you some ideas... https://duckduckgo.com/?q=off+road+dolly&t=brave&ia=web

I am sorry, I do not understand the problem, not do I see any screws. A wild guess, yes there is a notch that fits over the protrusion on the shaft, then the roller to the left must fit in the groove on the back of the wheel, as does the roller on the shiny bar above, that is what drives the machine. If you already know this, please forgive me, I am not trying to be snarky, I just do not understand your question.