The only non-ebay source I know of for Epic is
Craftworld Games but it's all 2nd hand stuff so their stock is hit and miss; plus they still have an ebay shop, and they know their market so you're unlikely to pick up a bargain.
There are no online retailers of new Epic stuff, and there probably never have been.
And given that
GW is pulling the ranges in their entirety your free delivery issues are going to be the least of your concerns.