I still use it, bought, not from a cache.
I just purchased some GP3 with a November 2013 expiration date from a dealer in China, o eBay.
I am here: http://tapatalk.com/map.php?nnril0
The 100 ASA Lomography B/W Film is Shanghai GP3 so its probably still in production and available in 120 but it's not PX I've never gotten the creaminess I can get with PX from GP3.
I will problaly go with FP4+.
You might try Tri-X at 200 and pull the development. I have seen some like that, very close to Plus-X. Not exactly the same but very pleasing.
Bill, I will try that, thanks. How much do you pull the developer?
Check the massive development chart. They have times for ei-200 in several developers.
You should be able to find sample results in Flickr.