I found the part numbers for the A500 adjustable OD and lockup switches.

[TrailBeast]

2 number 15718 fuel safety cut off switches from NX Express. (one for OD and one for lockup)
Cheaper at Summit under part number NEX15718.
1 number A74439A 6-20lb adjustable vacuum switch for kicking out OD and or lockup under load.

These NX pressure switches are advertised as adjustable from 25-60lbs, but I have used them as high as 75 without any problems.

Be warned they are a little pricey.

Here's the vacuum switch.

 

[65 Dartman]

Once I made the decision to switch from the 833 to the A500, i ordered the vacuum switch and a pair of adjustable pressure switches from PATC. Received them in today’s mail.

 

[Hellrats]

Like... Like... Like! Thanks guys