Ok, I won't say it, you know, that you don't need disks in the rear.. I just will not say that. At all. But if you don't "need" wilwoods and you just want to get the truck on the road (which implies it's not roadworthy at the moment), then I'd submit you don't need basic rear disks either. Dang, I said it, didn't I... Sorry. BUT, I can understand the desire to do what your long term goal up front and add the parts you want along the way in order to avoid buying new drums, for instance. So, with that in mind - this one would be my recommendation if you want a kit with everything you need:
https://www.performanceonline.com/71...it-rear-5-lug/
POL is a good company and they have good customer service.