Short answer/suggestion is to check with Ray & George at RD Enterprises first, and if you can’t get what you need the UK supplier is fine but a bit involved.
I think that is the supplier the Lotus Car Club of BC used about two years ago for a group buy. I understand windshields were not readily available at the time our side of the pond. At any rate, the process went OK and we got a bunch of screens. I was not directly involved in the ordering, shipping, splitting, and repackaged process, but it was definitely a bit of effort, so huge props to the club member that took point and another member that kindly transported mine over the Continental Divide.
The Plus 2 windshield I received was fine to my eye. My installer was able to put it in the car using the existing gaskets, even though we had new ones to hand.
Unfortunately it was taken out with a giant crack on my first big trip of the year. 
After a lot of hunting last year I found a dusty old stock replacement in California. I couldn’t even get them to ship it to Montana because the shipper they actually trust for glass doesn’t go there. Ended up being shipped to Washington state and I picked it up, brokered it across the border, and drove it over the hump myself. Thoroughly enjoyed the trip. 
When I dropped the new windshield off with my installer, he said this one was superior to the last one, but I really don’t know what the difference is. I have not had the new screen installed yet as I want to redo my headliner first.
Anyway, my understanding is Ray is working the windshield issue now, so I would definitely check with him first. I may be wrong, but I think Bean and JAE have got out of the windshield game due to the shipping hassle.
Here are copies of two messages Ray sent out regarding windshields. The first is from June last year when he was ordering a bunch, and the latest one in December with a status update. Honestly not sure if he ordered some for stock, but looks promising.
HTH
