With regards to the knuckle shim thingies, I'd say put them on the inside, to remove any side to side movement of the knuckle itself. Any left over shims can go on the outside to stop the pin moving side to side- I'd figure thats less critcal though really ( a few bits of fuel tubing shoudl do the trick there ).
I here you on the roller thing though, sometimes you gotta spend alot more money than you want to just to get a few parts that you couldnt find seperately ( TXT-1 roller vs axles for example
). Never mind eh?...