Martin I'm assuming you have the HP air floor Excel model??
There are really only two electric pump options, one of the HP Bravo models or a Sevylor. Note you do need a pump that will reach 1bar.
The Sevylor is used by a few folks on here and so far for half the price or less of a Bravo it has had good reports. It's flow rate is lower than the best Bravos so will be slower to fill the tubes initially.
https://www.decathlon.co.uk/12v-15-p...d_8335515.html
Many folks on here us the HP bravo pumps. Here is one example...
http://www.marinescene.co.uk/product...inflation-pump
There are several different models in the Bravo HP range. The cheapest is double the Sevylor price but also has a low flow rate. The best ones at and above £100 are dual stage so have a high initial output that fills the tube then switches to HP for the final pressure.
I have the digital twin stage Bravo and I've had my value from it but you do have to be aware many have found they only last a few years if used for daily inflation. Mechanical breakage of the pump or electronic faults relating to pressure setting have been known.
At about 5yrs old mine is just starting to fault on the electronic pressure setting side so may replace for next season. I will probably try the Sevylor if it's still £40.
Just one little point. The Bravos draw too much current for most cigar lighter sockets so you need to clip directly to the car battery. Like many I also have a stand alone small alarm type battery (12ah, about £16 on Ebay) to use the pump when the car isn't nearby.
Finally I am sensitive to others at some of our scenic launch locations and the Bravo is so noisy when it gets to the HP stage I use the supplied footpump in that situation.