Programming MSP430 based chips (sans Launchpad)
There are JTAG programmers made by other companies, e.g., Olimex.
But you will have to check whether they actually support the L092.

Only one of these two target boards works with the MSP430L092, the other one is for higher-voltage MCUs.
The L092 board has a higher price (well, originally) because of the additional level shifter hardware.

For almost all of those higher-voltage MSP430s, you can replace the FET with the eZ-FET lite which is on all recent enough LaunchPad boards.