Radio Shack used to sell a plug and play version of these nifty gadgets, sockets on the board and pin terminated wires:

Enlarge image for detail of the two part metal shrouds. I was able to remove the outer halves and cut pins down to DA15 configuration with a hacksaw. If you can't remove it you can cut the shroud down. Then again if you have the likes of that newfangled Dremel tool abomination, that might work almost as well. Only one lockdown on the cable will work, but that's the way I'd splice RGB together and any sense lines that might need to be implemented.
Here's
another one, but the shroud doesn't appear to be split into halves like the one I suggested. The halves appear of to be swaged at the lockdown holes, so drilling them out a bit may free the outer part of the shroud with ease?
This is a NEW DB25 Male to Female Jumper Patch Box Adapter with Jumper Wires. 25 Pin, Male to Female DB25 Adapter with Jumper Wires.
www.ebay.com
TLDR story from the day: I'd bought a Griffin cable that was supposed to drive Portrait and TPD, but only did TPD. One of the engineers picked up the phone at Griffin (those were the days!) and I swear he closed his eyes and worked out the pinout adaptation with me then and there in his head. There are pictures of it lost here somewhere. When I get home tomorrow I'll try to find it.