The G4 is 24" tall, the G4X is 30" tall, and should only be $20 more.
I used to import ASM skimmers, compare the LFS pricing to:
www.asmskimmer.com
The G4X is only $10 US more expensive on that site than the G4.
See if asmskimmer will ship via USPS then your brokerage is cheap, and all you have to pay is $5.00 brokerage, plus the shipping and of course GST but you pay that regardless.