If you are just looking for ultra cheap and get the job done, the most important thing to remember is that the act of stropping on loaded media is FAR more important than WHAT media you are stropping on.
What I'm saying is, if you finish your sharpening, and then strop on a paper bag laid over a belt, there will be results. The first thing I ever did to strop was took my tojiro dp off the one stone I had--a Shapton Pro 2k--and ripped off the flap of a carboard box. Then I stropped on it like 30 times a side, alternating(yes I was counting strokes...cause I didn't know what else to do!). I knew I had to get a proper strop after that, the change was immediately noticeable.
So heres what you do:
Go to a hobby/craft shop, and buy a piece of balsa wood and tooling leather. Buy some diamond spray, or whatever you can afford(I got a bottle of .5 micron CrO paste) and cut the balsa to match the size of whatever base you have on hand, then glue the leather to it, press some books on it or something.
Boom. Strop.