Not a lot around of other ones that I'm aware of, have seen the odd one over the years but they seem to have faded into obscurity - probably the cost that deters many! Shop around, the Vango one can be found much cheaper than Vango RRP.
Big problem with pumps of different brand to the tent can be the correct air hose coupling! They are not universal, and often unique to a brand, so check that the pump comes with a coupling to match your tent!
DO NOT be tempted by, or persuaded into buying car tyre type pumps - FAR too high pressure, and FAR too low volume for an Airbeam. Neither are most airbed or inflatable toy type pumps suitable, they've got plenty of volume but can't reach the pressure needed for Airbeams.
Amazing family weekend with old steam engines, classic car displays, market stalls, and full catering and bar. And camping on site - Save £25 by booking in advance.