Is it best to buy a OZ.1i in the UK or US?

I’m on the cusp of purchasing my first LAB putter and I’m also off to Orlando for a week with my golf society in a couple of weeks time.

I can purchase a OZ.1i off-the-shelf in my spec (I’m a pretty standard 34 inch kinda guy!) from Silvermere for £499. However, I was wondering if they are:

a) readily available in stock in stores (e.g PGA Tour superstores); and b) how much are they including tax?

The PGA Tour Superstore suggests they are $499 which currently works out to £376.

Any input would be appreciated!