Will love to see the progress! It looks like you have a great machine to start with, not too bad at all.
The rear-clamping feet can be found online without too much difficulty. I have a back-clamping Red Eye (which I've already used to piece a "jelly roll race" style top for my 1st treadle project). I just found another side-clamping one for a really good price and intend to change out the presser bar since all my other machines are side-clamping low-shank Singers and I already have a ton of compatible feet.