PLM umbrella compatible with Alien Bee 400

I just bought an Alien Bee 400 (second hand) and I am looking to buy a PLM umbrella that works with it. (I live in Spain and can't buy the Paul C Buff light modifier because they don't ship here) Any good quality light modifiers that will work with it?
Thank you!!

 

The AB lights accept any 7mm umbrella shaft, but will not accept an 8mm one.

 

Umbrellas are fairly universal, so another brand of umbrella that you can find in Spain should work.

 

Thank you!! This is what I have been looking for!!! Someone mentioned that I needed a certain mount??

 

If your flash only accepts 7 mm shafts, look at Elinchrom umbrellas. They only use 7 mm shafts and come in a wide variety.

 

That is completely wrong. All Paul C. Buff, Inc. Lights work perfectly well with 8mm shaft diameter umbrellas.

 

No such thing as a parabolic umbrella. It's just an umbrella.

All that makes any difference is the size and how close or far away you mount it from the flash-head.