Getting the right propane hoses, regulators, and adapters can be frustrating as all get out.
Getting the right hose and regulator for your stove will depend on what you have for threads after you remove your flimsy 1# line. Might be fairly standard and you'll find this will work:
It is from Cook Partner Stove and meant for cook stoves. You can read more about it here:
Cook Partner Hose and Regulator . I would double check the connection thread diameter, and pressure needed for your stove to see if it works with this.
I have a Cook Partner 22 and use that same hose, which hooks up to my 20# tank. I sometimes also use the
Y Adapter @4wheelspulling mentioned so I can hook both my stove and my propane fire ring to the 20# tank at the same time. I use a couple
Char-Broil ten foot extension hoses and a
brass adapter coupler for the fire ring, but have no idea what you'd need to connect them to the stove if you want extra length.
Home Depot also has high pressure hose and regulator they say is adjustable up to 10psi for "outdoor cookers," but I have no personal experience with it:
River Grille High Pressure Hose & Regulator
Good luck, let us know what you find so others with the same stove can do the same if they want.
EDIT: the brass adapter I linked to above is a 3/8" male flare x 3/8" female pipe thread by Anderson Metals. Here's a
whole page of their fittings. Perhaps something there will be of help to you with one of the hoses mentioned above.