I hope your vacuum cleaner had a HEPA filter of you would have blasted toner particles all over the place.
I refilled an old NEC Superscript 870 many years ago and it was easy enough (pull the plug, fill, close it). The HP 4si I just purchased a new toner for it for $15 shipped, they are high capacity so not worth refilling the old ones that streaked anyway. The Pantum I currently have hooked up came with a starter toner I plan to refill when needed but I rarely print much anymore so who knows if I will get around to it or just buy a new printer. I can't remember if my Epson Actionlaser 1500 had been refilled or replaced but it did run out back when I used to print quite a bit.
I don't think there is a universal kit for lasers especially if you have older ones but ebay should have toner suppliers for pretty much all the popular brands cheap and there are kits to make a hole in the toner cart if it is sealed.
What I collect: 68K/Early PPC Mac, DOS/Win 3.1 era machines, Amiga/ST, C64/128
Nubus/ISA/VLB/MCA/EISA cards of all types
Boxed apps and games for the above systems
Analog video capture cards/software and complete systems
Bookmarks