source for CHEAP NOS engine irons
 

http://cgi.ebay.com/ebaymotors/84-85...s#ht_500wt_941

Hope the Mods will forgive listing it here since I am not - technically - posting these FS myself?
;)
NOS intermediate "RX7" 84-5 housings: 7 available @BIN of $100!!! Don't know if its 13b or 12a but there is a PN listed to -

'luck

Stu Aull
80GS Alaska

13B center iron. Atkins lists them for $340 so these are a steal.