WTT/WTB: TWO Fi SSD 18 D1s or ONE SSD 18 D2

So currently I'm running a single D2 SSD 18. Running off of a SAX-1200D, so seeing plenty of power. This sub was bought 4 years ago or so and the only option it has is the copper coil so it's more musical.

I'm looking to run TWO of the SSD 18s, but getting a hold of another D2 is going to make me run at an undesirable ohm load, and I'm pretty sure I can't even run both a D1 and D2 wired together. My amp isn't 0.5ohm stable and I'm not trying to run that sort of load seeing as my electrical is basically stock.

What I'm looking for is two SSD 18 D1s. I have a D2 to trade for one of them if someone is willing, and also should be getting a hold of a Sundown SA-15 soon that will be up for trading towards another SSD too + whatever cash would be wanted. They are pretty similarly priced though so whatever works out is what works out.

HOWEVER. If someone has a D2 they are willing to trade for a SA-15 and it's all I can find, I'll probably be willing to settle for it and run at 2 ohms for now and I guess trade up for a better amp in the future.

Finding two D1s is probably going to be extremely hard... considering I don't have a bunch of money to spend and am only really looking to trade plus a little cash. So I will settle for a D2 is someone has one they are willing to trade for an SA-15 + cash.