It appears you have a Dexter D52 axle, this is a 5,200 lb. axle with a 6 on 5-1/2 Bolt Pattern
The correct braking assemblies and hubs/drums for a Dexter D52 Axle are, the Dexter Nev-R-Adjust Electric Trailer Brake Kit part # 23-458-459 and the Dexter Trailer Hub and Drum Assembly part # 8-201-9UC3-EZ (2.125" seal part # GS-2125DL) or part # K08-201-98 (2.250" seal part # RG06-070). The best way to find out which seal you need is to measure what you have now or just buy the extra seals.
The... view full answer...
Which exact Baja model do you have?
According to specs found online, the Jayco Baja 12E has a GVWR just north of 3000 lbs, which means it should use a hub with a 10 inch inside diameter. Please measure the inside diameter of your brake drums to confirm. I've provided a photo showing where to measure.
If you find that you do indeed have a 7 inch ID drum, the # 23-47-48 brake assemblies you mentioned would work perfectly. If you have a 10 inch ID drum, use # 23-26-27. view full answer...