Just about anything on these lists would work for me, with special consideration going to the PAA B314 as long as it's not Clipper Dixie (I already have one of those in 1:100) the TCA(Carribean version) DC8, BOAC Comet 1 and the Condor.
In addition how about a,
Aeroflot Tu-114
Trans Canada L1049
TCA(Canadian version), CPA or RCAF Northstar (Argonaught)
RCAF or CPA Comet 1
Martin Mars in FSFT colours
Canadair Argus
RAF Nimrod
Any Stranraer
Hey E, is that Heron you mentioned the twin or four engine variety?
Here's a shot of the two Mars with Hawaii Mars in the foregroung and Philippine Mars in the background