I haven't but I would suggest you contact one of the sites you found. They may have a list of shops with an import license that would handle it for you - for a price. It would seem that you could not come out any cheaper than finding one here.
I can only go back 34 years to 1988 when I bought a 1952 vintage Remington 721 in 300 H&H. I have replaced the stock and the gunsmith offered to rechamber to 300 Weatherby and I said no way! I have taken a couple of dozen white tails with it since then.
I have an FFII 3x9 Ballistic plex Duplex on each of my boys 7mm-08 rifles. One on an AR, and a couple 4.5-14's with the E1 Reticle on 2 of my rimfire rifles. I have had no issues with them and would recommend them but I would start a new shooter with a straight duplex or the cleaner...
I would get a freezer alarm like mentioned above, but also an outlet plug lock.
https://www.lowes.com/pd/TayMac-1-Gang-Rectangle-Plastic-Weatherproof-Electrical-Box-Cover/50372928
I have a soft spot for Mausers. I like old stuff that can get more potential with hand loading - 7x57, 8x57, 9.3x57, and the more modern 6mm Rem which I have in Mauser actioned rifles. I have always been intriged by the 6.5x55 (and x57) and the 257 Roberts and have no room for, but would...
I would take it to a gunsmith for their opinion. I would have no problem removing it it it were mine. I have a full size and compact Witnesses and really like them.
I found these guys (know nothing about them) that cut and thread longer barrels for suppressors - maybe they can make you a...
Walmart, Kmart, Otasco usually had Sunday ads for 22 ammo. Usually about $0.99/50 but went with the cheapest regardless of brand. Sent my dad after it.