If you're mainly aiming to boost DR quickly with bulk links, there are Fiverr gigs and SMM panels offering GSA or Xrumer-style blasts. These can push DR up on Ahrefs, but they usually don’t help with rankings and could put your domain at risk if overused.
For pure DR inflation, such as prepping a domain for sale or link rentals, services that drop links on high-DR but low-traffic sites can still work. You can check providers on SEOClerk, BlackHatLinks, or even some private Telegram groups. Just make sure you understand exactly what you're getting before buying.
If your goal is to build real authority, even with a limited budget, I’d recommend mixing in a few niche edits or authority profile links to keep things balanced. Let me know your budget and whether you're targeting PBNs, flipping, or something else. I can point you to some solid vendors.