Ordering breast pumps with tricare online

I’m almost halfway through my pregnancy and I’ve had a few people give me websites to look at for ordering breast pumps online with a prescription for tricare. With my first I just went to a local place with my prescription but they didn’t really give me a choice on my pump so they gave me a medela and i was not a fan of it, also was never told I could get replacement parts. We’re also on fort Greely in Alaska and driving 2 hours for replacement parts is a hassle, I’d love to just order them online.

I guess my questions are:

is it hassle free ordering online?

Is it easy to order replacement parts for the first year? (Both websites say I am allotted ___ replacement parts for the pump, also can order milk storage bags)

What was your favorite pump? I’m leaning towards spectra s1 because of the rechargeable battery

Edited to add the websites I’ve been looking at, if there are better ones you have experience with please post them below!)

https://www.babypavilion.com

https://thebreastfeedingshop.com