Camera Bellows stopped trading towards the end of 2008 they were owned by the same company as Lee filters. However
Customs Bellows was formed as an independent company to carry on with the business and now is owned by the people who ran the previous company, there's still a connection to the Glanvill family who founded the firm in 1895.
There's plenty of patterns etc online for bellows making, but I've drawn up my own for tapered bellows for one of my 9x12 cameras.
Ian