Does anyone know if there are replacement transistors for the ones used in the older PAIA modules. I know that PAIA sells the originals but no longer lists the 2N5129. Digikey, Newark, Allied and Mouser don't list any of them and I would rather not have to resort to NTE near-equivalents. 2N2712 2N3391 2N5129 2N5139 TIA Doug Forbes