Hello Buddy!, I'm sorry that you're having an issue trying to play Zarp Gaming. I'll try my best to find the map for you man!, So you can subscribe to it then you should be able to play the Zarp Gaming SSRP Servers again!
Clickey
If you click on the "Clickey" and subscribe to the Zarp Gaming's workshop, You might be able to play again buddy!. If that still doesn't work, I'm sure one of the owners will Gladly help you out.
Have a wonderful Christmas buddy!