Need advice on Regulator replacement. Which one?

[hht]

I will be needing to replace my propane regulator when I return to my off grid trailer in TX this winter, but I don't know which one to get. I plan on buying at home, then bringing it down with me, as there are no stores nearby where my trailer is set up.
It's a 1997 Forest River Wildwood (5th wheel) with two 30# tanks. The trailer overall I would guess is 36' - 38'in length.
I should have taken part numbers off the regulator before I left last winter, but I didn't.
So, who can tell me which replacement regulator I need to buy?
Thank you!!!!

[hht]

It looks just like this trailer:
1997 Forest River Wildwood 25RKS | D&K RV SALES, Canby, MN

[nomad297]

Where do the tanks reside? Are they right beside each other, or are they on opposite sides of the trailer?

Bruce

[hht]

Bruce, the tanks are right beside each other.
I have found regulators that *look* like they'd work, but I don't know what kind of pressure I should be looking for in a regulator. It's more the technical side of things I'm unsure about.
Thanks.

[boondocking]

RV propane regulators all operate at the same pressure, 11 wc inches (approx .4 psi).