Generally, any paper developer will produce warmer tones the more it is diluted. You may need to give the paper terrific increases in exposure and developing time. Don't forget that 1:10 overdilution of a developer means 1 pint of working solution develops about one 8x10 sheet of paper and then needs to be thrown out.
Agfa (Ansco) 261 developer does a good job and is easy to mix up yourself.
For what you will pay for a few packets of various specialty developers you can buy the basic chemicals to make pretty much what you want: Metol, Hydroquinone, P. Bromide, S. Carbonate, S. Sulfite, Ascorbic Acid and Citric Acid. Add some Glycin to the list if you like, I don't find much to recommend the stuff but its use is very chique. Phenidone (dissolved in propylene glycol) can be useful for making some of the really cheap home-brew developers developed by Patric Gainer
http://unblinkingeye.com/Articles/VitC/vitc.html.
