Photo 2 for Spaform Spa Hot Tub Genesis Blue Jet Pump Wet End GC150 GC100 GC050

i have the same blue wet end, it appears the small black drain plug internal thread has disintegrated? the black plug and thread are ok it looks like there was a thread insert set into the blue case. do you sell them? thank you in advance

morning, im after a gc150 wet end impeller or the complete wet end, many thanks