$45 for a B183 card sound about right? D.A. sells these for $65 but he kinda sets his own price whether it's what the market will bear or not.
Let me see if I can swing this to a 1290 conversation briefly: EN10041 shows a B183AM and the N and J parts of a B189. From the schematics the N sections of both the 189 and the 183 are identical. M section of 183 is obviously different than the J section of the 189, which is just two N sections of either card on one card. So, a 1290 in the absence of a B189 would need 3 B183 cards, or am I missing something?
I promise I'll read as much as I can find on the 1073/1064 before I start w/that interrogation...