Looking for a tiny electric compressor

Anyone know of a supplier for a very small compressor? Something like what's in [here](https://rockbrosbike.us/products/rockbros-as1-pro-mini-electric-air-pump-120-psi-advanced-battery-life?pr_prod_strat=pinned&pr_rec_id=315c54ec3&pr_rec_pid=7585083195444&pr_ref_pid=7585280196660&pr_seq=uniform)?

My requierments in order of importance are:

* 3-4 bar, more is better * less than 10x5x5 cm, smaller/lighter is better * 1L/min at 3 bar-ish * 12v or lower, I don't want to have to stack a lot of cells to power it.

I'm designing a device to fill bike tires while riding. It's for enduro mountainbike racing and gravel racing where the terrain and therefore optimal tire pressure changes significantly.

I already explored using a CO2 cartrige. Theres only enough CO2 for a couple of cycles, plus the device would still need a battery to control the valve.

I've looked at automation direct, digikey, mcmaster, mitsumi with no success. What other suppliers should I look at? Could there be some keywords that would help me searching sites like aliexpress?

Edit: I am specifically looking to not cannibalize an existing product.