TAPR has 80m and 160m WSPR transmitter kits available. These are similar to the 10m/12m and 15m/17m WSPR transmitter kits in that the user solders the low pass filter components to the pcb. In addition, the user also solders the drain inductor for 80m and 160m transmitters. 80m and 160m WSPR Transmitter Kits.
Author: Bruce Raymond
Versatile WSPR Kit is now available for 15m/17m and 10m/12m.
Link to WSPR https://tapr.org/product/wspr/