2 × 20 pin SMT to DIP adapter?
Ready made? Maybe. Based on the pin pitch and relative width of the adapter, Look for 0.5mm pitch tsop (or tssop) 40 and 48 pin adapters. There is 0.65mm pitch tssop as well, avoid those. You can find these in most common places (ebay/dipmicro/digikey/etc).

You could also try your hand at pcb design, and have a board made at a pcb fab. Oshpark is good/cheap for small boards, while Seeed has a decent ten (you'd often get 12) 10x10cm board for 9.90 plus small shipping.

You could make a board specific for just adapting that socket, or make a board that holds everything you want, microprocessor and regulator and whatever.