727 deep steel pan

Well I dove into the rabbit hole on this one. eBay is the cheapest route for everything. This is the pan I went with
Transmission Oil Pan for Dodge Ram 1500 2500 3500 Pickup Durango Dakota | eBay

They have an offer option, I offered 27.99 with free shipping and they accepted.

Best price on the mopar gasket with free shipping Transmission Oil Pan Gasket Mopar 02464324AC for sale online | eBay

This 727 filter extension has an offer option, I offered $15.50 and they accepted For Dodge 518, 618, & 727 14010 Deep Transmission Pan Filter Extender | eBay

I got the WIX filter from my local parts store just for convenience. All told I spent just under $85 for the whole swap with tax and shipping included. Hopefully worth the extra capacity and drain plug. We shall see.