I just placed an order with Messick's last week. Excellent people to do business with. Getting ready to drop another order tonight or tomorrow. Time to give this old tractor some love after beating it for 13 years.
Keep an eye on that gear box. I paid $1300 for a new one last year. Those gears in there do not like to run dry and I fried mine before I knew what was going on. I'll be rebuilding that one for a spare for next time.
You can also go online at Messick's and pull up parts diagrams to see what you are in for. I ended up buying all the service and parts manuals for the BX23d and the RCK60bx22 mower deck.
Bought me an extra deck last week so now I'm set to mow non-stop. I'm replacing all the seals in it then my normal deck will come off and be gone through again.
You can get some Oregon blades for that with the mulching fins and that deck will cut a 1000X better.