Rewind,
I hear the frustration regarding inventory on Phantasm and the only way is to work with your local store and get them to place an order for your set up (there are wait times though).
Slingshot changed tack shortly after releasing the Phantasm, so you now choose a mast type (and there is quite the choice) and then you choose the lower (fuse, front wing and rear wing).
There are so many combinations and so its next to impossible to have an inventory of everything because wingers, wind foilers, kiters and prone foilers all will choose different set ups!
With regards to the PTM1001, PTM730, PFI684, PFI834 etc. they have either not arrived, or the only way was to order the complete lower package. Time will eventually work out the knots and the wait is well worth it I can assure you