Disclaimer: I'm an novice on regulator servicing and modification, and plenty of people on this board know FAR more than me. Perhaps wait for a few replies, before buying anything.
The best option would be to get a kit from the manufacturer of you reg, which you know is compatible. That aside:
I cannot vouch for compatibility with any of the regulators you listed. That said, I have converted some Scubapro MK10 regulators using the "Scuba Choice Dive First Stage Yoke to DIN Regulator Conversion Kit", which was around $25 at the time, but is apparently closer to $45 now. Seeing as I can find the Scubapro branded one cheaper, I'd probably go with that.
Amazon Link
Since you have 4 regulators, there may be a chance this kit is compatible with one or several of those regulators you listed.
If this kit is compatible, the process will involve unscrewing the current yoke-adapter, and installing the din-adapter. It's a little more complicated than that, but here's a video (below). You'll want to start from the beginning, however, if you want to see the removal, it's around the 5-minute mark. I think in one of his later videos he talks about the right amount of torque when re-installing the tank-adapter, maybe around part-3 or so.
You may want one of these tools as well, to hold the first stage. Either works fine (I have the cheap one), but obviously the $25 one is nicer than the $12.50 one.
This tool allows you to screw into either your first or second stages to hold them while working One side has a low pressure thread The other end uses a high pressure threaded end Holding your first stage while working on them just became affordable This is a awesome combination tool Notice...
www.piranhadivemfg.com
Piranha just added this tool for you! Another great little tool that for the price you just need to have for those just in case moments Built to last this tool is made for even the dive shop use! Notice: Service equipment are not eligible for returns unless defective! We will gladly replace any...
www.piranhadivemfg.com
