Try BradAir Aviation Consultancy Ltd contact details at
www.bradair.com
They have developed an add -on (really more of a wrap around) program for the B737 Boeing Mk7J32 RTOW performance program, so you can rapidly create your own RTOW pages.
It quickly creates the input files for, and runs the Mk7J32 performance program. It then performs a full analysis of the output from the Mk7J32 and prepares a printout table (page) in aircrew friendly format for the flight deck RTOW manuals, for both normal and improved climb speed. Also works with contaminated runway data. Does single runway, single airport or multiple airports automatically.
Give them a call - tel +44 (0)115 921 7696. They are a UK company and I understand that they have a demo cd which explain how it works. It has been used in a major UK airline for several years on the B737 as well as a similar version for the Fokker 100 / 70. Also available is an analysis / printout version for outputs from Airbus's WINPEP program the A320 / A321 / A330.
Same company also have a PC version of a full commercial airline loadsheet (weight and balance) program called QUICKLOAD. I've seen it in operation, great tool when the main weight and balance computer fails - instead of taking 10 - 15 minutes writing a manual loadsheet, their program can print a loadsheet in less than 2 minutes.
Good luck with your search.