Thanks kgg, I don't think my DSC245 is the one thats been cloned (that I can see). I am finding it extra hard to research as there seem to be two distinct variants of the 245. Mine looks as in the linked picture, and has the bobbin winder on the front. Same style of casting as the 1541 etc.
I have a manual for the DSC245 and it explains the conversion, but when I dig a bit deeper, I realise this manual is referring to the other version of the 245.
I am currently out of my depth! Once i know what I actually have, and what I need, I'll be quite happy installing and setting it up...my my gosh, industrial sewing machines are a minefield of variants!
Thanks for the suggestion though...appreciated and was worth a look!