Are you kidding?
A Chryco type amplifier such as SMP's LX101 is super common.
And if not in the store, it will be at one of their distributors and they'll have it in that day.
Getting one to the store in a timely fashion is one thing,i was talking about just walking into the store and picking one up without preordering it. The cars they are used on are getting old by partsstores standards,not yours or my standards.