That submarine pump creates a fair bit of pressure but is lacking in cfm like the small car compressors. I don't think a fridge compressor will give you enough flow either.
Wouldn't a decent sized centrifugal fan work for this? I thought recorders don't have all that much air resistance. In fact wikipedia mentions pipe organs use pressures in the order of 0.1 psi which equates to roughly 2.75 inch-aqua. I'm pretty sure even small centrifugal fans that were used in computers years ago can create static pressures higher than that.