Some pump companies have been going out of business lately. As far as I know LeLuv is still around. Google them and check prices and options. Leluv has individual cylinders and also full packages.
My tubes are leluv and I have a mightvac pistol style vac pump. The vac pump in the ubiquitous brake bleeder kits are also a good option.
Some guys prefer electric pumps. Wander through the pump forum and you can find what types there are.
Initial: 7” BPEL; 6” NBPEL; 5.25” - 5.5” MEG
Current: 7-7/8” BPEL; 7-3/8” NBPEL; 8.5” BPFSL; 6.5” MEG; 6”x5” Flaccid.
Goal: Improved/consistent EQ while managing ED. Secondary: maintain current stats.