Database of cancer cells
The National Cancer Institute (NCI) has a list of doubling times for a variety of commonly used cell lines, see 
https://dtp.cancer.gov/discovery_development/nci-60/cell_list.htm

I my experience, these doubling times are quite stable/reproducible, provided that cells are kept in standard culture conditions. While doubling times differ a lot between cell lines, they are also very different in size, and larger cells tend to have longer doubling times so that the biomass growth rate is actually rather similar between lines.

Note: these doubling times refer to cell culture conditions. Actual tumors in vivo grow much more slowly, due to lack of nutrients, suppression by immune cells, and what not. Estimating cell growth rates in tumors is a much more complicated business, and I don't know of any database for that.