power booster

i've read a lot of threads on using 73 up a body boosters on 72 down, but I've never been able to find out if the 73 up boosters will fit the 72 brackets. i have all the 72 brackets and rods, but the midland booster is shot and the newer ones seem easier to get. I know about booster dewey, but would rather just be able to order one instead of shipping mine off. thanks, dave.