Diesel re-pumping fuel pump

Hi have a problem which is not vehicle specific. But I have had very good experience with the Volvo forum although I have unfortunately no Volvo anymore I like to read about the V70 850 C70 & co. I like handling here far better than with the current vehicle forum where I am now. Ok enough liquorice rattled. I am looking for a solution long-term 20l canister convenient to pump into my vehicle. The DIY pumps for the drilling machine are unfortunately broken after 20l. My current thought is an old fuel pump that is normally in the tank or to be used next to it. I have not yet had any problems with tank and fuel pump and therefore do not know at all how these are constructed or whether it makes sense to use something like that. Or whether they suck in themselves or what the conveyance is like. That’s why here the question is whether it makes sense or what you find for alternatives. Alternatives I play with the thought of a special lid for my canisters z u build with a compressed air connection and a three-way faucet where I can put air in the canister and relax with the 3rd position again. Furthermore in this lid also a hose that goes from the canister floor to the tank, so that you can then carry the fuel with the overpressure. So with luck I blow up the canister with 8 bar and the shit injects me 80m into the height 🙂