It's possible, the market was there for 3 weekly flights by A310 so a twice weekly 772 flight would cover the same amount of pax with some growth. The big question is could the 772 operate from LBA with a useful load? The 773 obviously can't given PK775/6 is a 773 at the moment post Ash Cloud and is having to operate ex MAN! Finding a free 772 could be a problem as the 6 they operate are 4 ERs and 2LRs, I suspect they are all fully utilised and therefore need some tweaks to schedules or leasing of an additional ac. I'd be surprised if they used the LRs as they would probably be better utilised on their longer runs. We will see!