Those guys at other side of the pond use same Bravo electric air pumps. Used to have a high pressure air deck. Inflated it with a cheap 220V electric pump to 4.0 psi which was it's top, then air topped to 12-14 psi with a 12 V tire pump and suitable valve adapter & gauge. Took some time, but worked wonderfully. Once at sea was topped right back with a heavy duty hand kite pump when needed.
Air decks are high pressure, low volume, a good quality simple action high pressure kite pump will do the work neatly, can take it along when boating and air top deck back when in need.
Assume Zodiac buys same Bravo pumps at Bravo Italian factory, not sure if they have propietary Zodiac brand, probably rebadged ones with own logos. If so, expect pricey numbers as everything coming from them.