Non TPM boards were only sold in China and Russia, so finding one may be difficult. For the 2900 the part number is F413C and for the 2950 it is N192H
I was hoping that someone had a master list of all the server motherboards and part numbers? Something like “PowerEdge 2950,  Motherboards a X999R, H603H , CX396 etc…   Thanks 
List of Motherboards