I personally wouldn't go so far as you and call gaining access to Elven things as extremely difficult, though obviously it'd be Blackout's interpretation of how much of an Untouchable we are in Asur Society and how far-reaching and all-knowing our enemies are.
While I doubt we're ever going to roll up to Marienburg's Elven Quarters with our entire Mercenary Company to buy the bestest gear, I'm sure we could build up relationships with Asurian ne'er-do-wells (black market stuff), other Asur mercenary bands, shady (or just gold-minded) traders and merchant houses, as well as with other miscellaneous Asur friends we make along our adventures. I doubt even the Pheonix King could stop all of them from being chummy with us. It'll take work to establish ourselves but we're just fresh into our exile when the story starts so that's to be expected.