While no help here finding remington hbwc's, hbwc's are easy enough to cast or make. I've either cast or swaged my own hbwc's for decades. Any bullet that is cast with a soft allow (around 7bhn/8bhn) and the lubes will make an excellent hbwc. I like to turn rn bullets into hbwc's. They can either be swaged so the bases are flat/square like traditional store bought hbwc's or the can be swaged so they have a bevel base. The bevel based hbwc's are extremely accurate.
Some 95gr hbwc's with a bb swaged from rn bullets for the 32cal.
Used to do the same thing with the h&g #50 wc's that had the bb. Would use a 10-cavity mold and make a pile of them. Traditional lube them (only 2 of the 3 grease grooves) and shoot them that way. When I wanted some hbwc's I take the cast/lubed h&g bb #50's and run them thru a swaging press. Never did find a factory made hbwc that could outperform those home swaged hbwc's made from those h&g 148gr wc's.
Anymore 1 just cast all my hbwc's. Cast has an advantage over the factory swaged hbwc's because I can use any alloy. Extreme accuracy with a wider range of loads/velocities. A win/win in any book.
They say luck is when opportunity meets preparation. Relying on others is dumb luck/luck of the draw. If you are passing along your reloading skills/knowledge/equipment to the next generation, you might want to look into making hb bullets. Not only have I enjoys making/shooting my own hb bullets for for 25+ years. My children and their children will enjoy a life time of hb bullets. It can be said that it the industry/firearms/calibers that's changing. I say good, let it change!!! A reloader's knowledge of hb bullets is just another tool in the box. A different caliber is just that, a different caliber, big deal. A bullet designed in the 1800's and was listed for sale in the lyman 1900 mold catalog, the 150gr 35870 hb bullet designed for the 38 long colt. 116 years later in the latest/greatest wonder round, the 9mm @ the 50yd line doing 10-shot test groups.
Really nothing to do with remington hbwc's. But this post has everything to do with the wealth of knowledge of the people that have used them. That knowledge is hard to come by and can easily be transferred to other calibers. Just something to think about.