Checking stock levels at Microchip Direct and on findchips.com and it doesn’t look promising
http://www.findchips.com/search/rn2483 - shows Avnet Europe have stock, but seems unlikely
Otherwise your best bet might be to get a dev board like the Lora Mote or PICtail, and desolder the module.
Depending on what functionality you want to test and where you’re based, you could also possibly try a RN2903.