parkkicks

hey everyone im looking around for a nice shiny air cleaner for my 22r. it seems though that due to my stock aisin carb i need either an adaptor (something like 40 bucks at LCE) or i found a cleaner on LCE that is metric and fits 40-45 mm.

so a couple questions.

1. am i correct in assuming i either need an adaptor or a metric assembly?
2. what is the carb size for a 1987 22r
3. is there any cheaper adaptors out there
4. does anyone have any experience with this particular assembly? http://www.toyotacatalog.net/M1WebGe...7-7B0784C53351
5. anyone have any recommendations on assemblys?

any other comments or input are appreciated

thanks

Parker