I saw this and thought I would share it here in case any local members were interested.
No affiliation with the seller.
https://seattle.craigslist.org/tac/atq/d/cobblers-bench/6681347794.html
I just realized that rotten old board it was sitting on was the original stand. Did you fix the original stand or just start over with a different one? Either way, great job! I do like the cut out under the arm. It looks like a very useful feature for that machine.
For those bidding be aware of that "Dynamic Bidding" clause. It means that the auction for every single item up for bid continues until the last bid on the last active item is in. I bid in one of their auctions not too long ago on a couple old chainsaws. I was the only bidder until after the posted closing time then I was bid up by people who had shown no previous interest in the items. The auction drug on for about 6 hours after the posted closing time. It was small money on a small item but was still a frustrating thing. Good for sellers and auction houses, not as great for bidders.
I think you probably could for smaller single holes. The trouble would be the tooling. A punch to attach to the needle bar and a matching die under it. A domestic machine probably wouldn't be sturdy enough.
*EDIT* I don't see a matching die under the punch. Maybe the die isn't needed. You would still need to figure out where the pieces punched out go and how to space the holes far enough apart. A standard sewing machine probably wouldn't have a long enough stitch length.
You might check out Springfield Leather. Watch the shipping charges though. They add up fast. Probably true for most online sellers.
You can buy individual hides from Wickett & Craig.
Maverick is another good bet.