Yes, you can still buy a pg long (they also sell pg long copies. o.O)
A quick look in a popular local forums in Hawaii has a range of $80 (used) to $180 new.
Unsure of what V T cycles or other local shops sell it for... but I can find out if you really need to know.
VT has 'em but not consistently. They get in a bunch and sell pretty quick. They'll ship one stateside for under $180 if they're in stock. The problem I had with mine is a rapid increase in noise and a failure of the spot-welds holding the baffle pipe. The tip broke through the rear can and had to be welded before the baffle failed altogether. Nice track performance but not very durable on the mean streets of Deepinnaharta.
Wheelman-111
Most of my money is spent on scooterparts. The rest is just wasted.
"ISO": '03 Vespa ET4 Malossi187 74MPH
Flash 9: 2001 Elite SR Contesta 72 ZX Tran, 9:1 Gears, Stock Airbox/Carb/Pipe 58.8 MPH
Punkin: 2010 Vespa/Malossi S78, 61MPH