Fixed Income Excel Spreadsheets Urgently Needed

Hi everyone!

I am joining an in-house corporate finance team where I will be doing traditional corporate finance staff... The problem is that previously I have been more focused on the equity side of things (DCF modelling, business development, investments, equity valuations) and now I will have work on debt as well.

Therefore I urgently need real-life fixed income models (either from investment banks or rating agencies)... I found some on duration, valuation, but I think I am looking for a more comprehensive website that would cover other topics such as bond portfolio, options etc and that could give me some sort of assurance in the quality (i.e. "real-lifeness") of these models.

Please could you also recommend a good proven book on fixed income securities!!???

I would be extremely grateful for your advice, to which I look forward.

Many thanks in advance.