that looks like Waffencenters Gotha site and the last time I emailed Enrico a few month back they were shipping to the states
you have to email them what you want and get a total ask for insured and uninsured prices and then you will have to transfer the money to them and then you wait because they might not have on hand and DHL sucks
I would look at there parts offering and order extras for down the road, the shipping will change little
and if they have stopped mailing to the USA it is news to me
on transferring money I have found Zoom and World Remit to be the cheapest for me
I will email Emrico to check on shipping
you also need your computer to translate, unless you speak and read German
I emailed Enrico to check on the shipping to the state, there site is not easy to navigate the first time but for those looking for old airgun parts you have to learn to deal with it and I'm more then happy to help
even finding their contact page can be hard but the guys are first rate people
https://ww1.waffencenter-gotha.de/kontakt.html
my email
mlwolfram@msn.com mike wolfram
did you try here
http://www.carlwalther.com/page2.htm
I just called with no answer, more then likely went home early for the holiday
http://www.carlwalther.com/views/ev_lgv-1.htm
https://p11.secure.hostingprod.com/@carlwalther.com/ssl/orderform.html
might be the best way to go