Wiseco sells 10.5:1 3T-C pistons off the shelf.
They will clear the 2T-G valves just fine.
and with the 2T-G head they come out closer to 10.8:1
1941cc with 89mm bore.
Venolia has the specs for both 2T-G and 3T-C also. but they are more $ then the wiseco's. better quality imho also.
hth