My understanding is that they don't plan to manufacture any more of the conversion kits, but intend to produce it as a complete product like the P30LS. I can't remember where I read this, but I think it was from responses to comments from Social Media Girl on Instagram, so that may not be official.
Don't forget this is Hates Kustomers we're talking about here. If they can upsell, they will.
That said, I'm still kicking myself for not getting one when they were on clearance awhile ago.