Welcome! Good luck with getting the metal trigger guard from them, H&R hasn't had any metal parts in stock for a looong time, Gardner sold the last of them a few years ago, I got the last of the defective ones which were all that was left when Gardner closed last fall, they may show them in stock, but I doubt they actually have them unless they found some during the move which is always possible, they've found other obsolete parts in the past like the mannlicher forends and Ultracomp barrels.
I just talked with Gary at Talley, they have the spacers all set to produce and they should have a production schedule for both parts in a week, they've had problems getting the spring pocket angles perfected on the trigger guard, he just bought a new 243 Handi as a test mule to work out the final issues, I'll give him a call next week for an update.
Tim