If the company has public debt, go to bloomberg and obtain their YTM.
if no public debt (or no debt), then you proxy using spreads per the other posting.
Sounds too much like you're trying to have someone else do your work for you.
Then, where's your value-add?

The issue is that the data source is needed for an organisation. And given the volume of companies evaluated by the organisation, it is not possible to spend too much time on subjective estimation of debt for so many companies. So we need a credible source whose methodology once verified could be ...

The issue is that the data source is needed for an organisation. And given the volume of companies evaluated by the organisation, it is not possible to spend too much time on subjective estimation of debt for so many companies. So we need a credible source whose methodology once verified could be used repeatedly. Read More

ok, we'll let you slide on the laziness part!

We would recommend using bloomberg or comparable data source and set up a bloomberg download spreadsheet using BLP functions in which you grab each ticker's debt.

Due to some issues we can't use Bloomberg products. Are there any other data sources that the wise ones are aware of?

reuters? thomson one? factset? cap iq? ANY data vendor!

Cap IQ doesn't compute costs of debt...Thanks for the help. I am trying to check with other sources. And I have come up with a tentative model for in-house calculations

you're not looking for cost of debt, but rather, current YTM. in either case, get bloomberg. public libraries, friends, be resourceful.