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I’m new to the Concept. Where can I find guitar fingerings for the Lydian Diminished and Lydian Augmented scales?

What scale books do you use?

mostly the Segovia book...can anyone recommend any others?

I think Sandy was saying is what is your jazz scale practice book. If you have one jazz scale book this scales (Augmented, dimished, etc.) can be finded under another name.

There are some jazz guitar books with good scale fingerings. The Dennis Sandole Guitar Lore book comes to mind as well as the William Leavitt Modern Guitar series. There is a Joe Pass book ( The Joe Pass Method) that has fingerings. You can arrive at fingerings for the Lydian Augmented and Lydian Diminished by changing one note of the major scale. I do like the Segovia book because it has you play up and down the fingerboard instead of just across it. I also like it because it manages to accomplish this with no stretches.
One last book that is not well know but really worth checking out is the Chuck Anderson book The Six Secrets of Guitar Fingerings:
http://www.curtsheller.com/books/6SGF.shtml
Good luck!

Sounds like a lot of work. How much should I practice the scales once I figure out how to play them?

I don´t know your knowledge, but I case you´re a not begginer in guitar I think that in few days you can try these fingerings in your instrument. It´s not so difficult try it, the hard work it´s to achieve good phrasing and to remember the changes between chords.

For bass guitar, I made a 12x12 table with the chromatic scale by the 12 columns. The first row lists the primary modal genras: e.g., Imaj II7, etc. the next rows indicate the roman numeral for each of the scale. The cells of the table are one fret apart. the only decision left is when to shift strings or position, dictated by what you want to 'say' and efficiency.