Can you help? Sorry about the following but is't been a nightmare of a morning

So I buys this primo powerbite crank set from a member on here and although it came with the BB, arms, axle and all the hardware, I have had nothing but trouble with it so far

The 'useable' BB was shot and was beyond use so I buy another, easy enough.
I get the arms polished and kitted out with GT decals, easy enough.
I fit the BB into the frame, a right bitch but, it's fitted.
Now, the arms. It appears the arms are from 2 different gen sets

I then try to put the axle through the BB to find that there was a very slight burring to one end of the axle. It went through easy enough from the opposite end. So, I take out the axle and slam it into the non drive side arm, fit the hardware and a spacer and push the axle back through the BB

I then fit a spacer on the drive side, place on my GT power disc to find it 'slaps' about on the axle

I am guessing that I will need a top hat washer but what size? The diameter of the axle is 22mm and the diameter of the disc inner is 24mm. Do they do a top hat washer like that? for 2mm?
Or will I be faced getting a new chainwheel? If so, what is the best one?
I will be running a 14T - 16T on the rear.
Thanks in advance for your help, and your time
