That's so weird that you can't get Lantus - it's not like it's a controlled substance or anything - in fact, unless you need it for insurance purposes, you don't even need a prescription here. You need a prescription for the syringes, but not for the insulin itself.
I was on Lantus before going on te pump, but could never get things exacty right - didn't seem to last as long as it was supposed to. Still, it was better than injecting every 4 hours.
Good luch with your searc!