Shipping is going to be expensive no matter where you get your bulbs from, as it's the bulb's length and delicate nature that is why they're expensive and difficult to ship to prevent breakage. I would highly consider calling some of the LFS around and seeing if they carry and/or can order the bulbs that you're looking for, as I'm sure even if they charge more than the online dealers, at least with them you don't have to pay shipping, since they can combine the shipping for numerous sets of bulbs, or just get some locally from distributors (sunlight supply comes to mind).
I've gotten sweet deals on bulbs from David at CoralReefFarm, so I would call him first to see if he can get them. If they can't, then I would call some other LFS in the area and see what they run. If you still can't find the bulb you're looking for, then I would do an online order, but first I would see if anyone else needs bulbs, so you can do a larger order and split up the costs of shipping among a few people.