Right now your best bet is to find one of the early Century L1A1s, some were built on inch Imbel recievers and others were built on a Canadian reciever......................both are excellent recievers. Stay away from the later Century recievered mixed inch/metric guns,.....some were ok while most had problems.
Another option is to get one from DSA or check the Marketplace on the AK Files or gunbroker.
Here's my L1A1 built on an inch Imbel.
My South Afrikan R1 with a Portuguese G3