^^There is an 89X. Not sure if it's shipping yet, but it's on the site!
Note that if you have an 81/89 or an 81tw/85 type setup, where only one pickup is splittable, you can't switch them without re-wiring; the pin layout is completely different, with the splittable pickups having a 7 pin connector, since it's 2 pickups in one.
Yeah, I didn't notice there was an x series link under the dual mode list, the 89x isn't listed in the regular x series. So just to check 81 twx and 89 x are compatible?
Just one more quick question. I ordered the 81TWX/89X for two of my guitars, this will work with a single volume know setup (they are both 7 pin?) right?