Once a Sinclair Interplanetary product is mature, it will often be licensed to a contract manufacturer. The CM handles ongoing production and marketing of the part, leaving Sinclair Interplanetary free to concentrate on development of new technologies.
Digital sun sensors are now manufactured under license by NewSpace Systems. The legacy web page is here.
The RW3-1.0 reaction wheel is manufactured under license by Millennium Space Systems for the USA territory only. For sales outside the USA, these parts continue to be manufactured by Sinclair Interplanetary.