I've gotten great advice and help from Will Samples, at S&S Imports (214-826-5977), although I think he's pretty busy with his work on 190sl's, so I don't know how much he works on pagodas himself these days.
I've had substantial work done at Dallas Auto Sports--where Will S referred me--on Garland Road near White Rock Lake (214-320-2228): top end rebuild, new fuel injection pump the biggest jobs. They seem to know what they're doing quite well and are quite fair in their pricing (though not cheap).
Arthur in Carrolton did a prepurchase inspection for me some years ago and saved me from buying a problem pagoda; he seemed quite good, although I haven't used him for repair work otherwise.
Welcome to Dallas!
Rick
Dallas TX
1967 250SL, 4-speed