I have a batch of LEA-4T chips on a small very professional developement board, I think its the same one as used in Ubloxes developement kit but now superceded by their LEA 5 and 6 units.
I can supply them at £50 (GBP) each plus P&P
They are wired to take serial i/o at logic levels ie ideal for micro interface, or add an external level convertor chip eg max232.
they come with antenna connector type smb. and have power regulators on board for powering from +5volts.
I have modified several for my own use to run and power off usb, as the usb pins are there on the chip but need wiring up. (its about 6 track cuts and 5 or six wire links from memory, but its quite tricky soldering onto the ublox chip leads as they are so close together.
I can supply them modified at £75 each. they will then run on either usb or serial i/o
I think the chips are no longer available from ublox unless you can prove you need them for retro fit on existing systems. I think the chips alone are about £50 in quantity anyway so my developement board complete with all its ancilliary cicuitry is a bargain!
I can supply all pinout details and some "fair use" backup help in getting it running .