I have exactly what you are asking for. Alternator, regulator, and installation kit, all new and never installed or used. These were supplied as part of an engine deal back in 2017 and I decided to install a larger unit. Never got around to selling these. The regulator install kit is missing the 5A and 2A circuit breakers, I used them. One of the insulation walls in the regulator has a small piece broken off, you can see it in the picture. This was how it came out of the box, new. As an electrical engineer, as far as I'm concerned with proper installation this is something I'm happy to live with.
Cost of all this from B&C new today is U$1,102. You're welcome to buy the lot for U$500 plus postage. The only problem is - I'm in Australia. Standard international air delivery from Australia Post will be around U$80, they quote around 10 business days and this includes tracking. Insurance would be a bit extra.
Send me a PM if you are interested.
Regards,
Adrian