There was a dealer in the Dallas area, but I don't recall his handle. If you haven't done so already, you might try posting on VTXOA.com, but be prepared for the onslaught of inpatience people who will remind you to do a search first, just inherint with VTXOA posters.
I did a Google and this info came up;
Certified AMSOIL Dealers:
Mesquite & Rockwall and West Dallas (I-30 Corridor): Al Valdes - 214-538-1445
Al's Preferred Customer/Dealer form
Allen, Frisco, N. Dallas, Plano and Mckinney call our local stocking dealer John Campbell at (mobile) 972-816-7813 or office: 214-257-7620 (also new addison location)
Please visit John's AMSOIL - Dallas Website The Patroits Oil Group.
Arlington: Jesse Benavente - 817-637-4439 or 817-472-0143
Richardson - Brian Galindo - 972-235-2627
Cedar Hill - De Soto, Duncanville & West Dallas:
Anthony Oliver 214-621-0508
East Dallas: Ches Cain - 800-579-0580
Carrollton/Frisco - 972-816-7813
Lake Dallas/ Lewisville : John Hutchins 940-947-5046
Denton amsoil - Tim Sanders - 940-497-2886 or John Campbell 972-816-7813