The fast, work-without-fiddling answer is:
Buy a Smith LP-rated regulator, any brand T-rated hose, and buy Smith LP tips which you can match to your torch model online. Just phone in the order and get it all from one place.
Smith # 40-50-510 Heavy Duty Series 40 Propane, Propylene or Natural Gas Regulator, CGA 510 Inlet Connection, 0-50 PSIG Outlet.
If you don't already have flashback arrestors on both regulators, buy those too.
Vendor with good ratings from other buyers. I got all my OA gear used so I've not ordered from them personally: