Holga's are manufactured by Tokina Company, Limited. Their web site http://www.tokina.com.hk/ has a link to Product Catalogue. Click that, then the Camera icon and you will be able to download a PDF of their Holga catalog (file is dated 2010). I do not believe this is the same Tokina that is headquartered in Japan.
Lots of items in it. more that just cameras.