US postal costs are a nightmare with many sellers having a minimum order quantity as well. I recommend
1) Identify what product you really want - make and product id.
2) Do an internet search for stockists
3) eMail each one and ask for their best/lowest mailing price,
Eventually decide to accept some financial pain, unless you strike lucky!
Cheers
Roger
PS, yes TMR Distributing is a good supplier, and being in Canada, their costs are sometimes more attractive.