Book (Nonfiction) - Welsh Language Learning Books Wanted

I'd like to trade for Welsh Language learning books - courses (with or without CDs), dictionaries, workbooks, grammars, vocabularies, flash cards, etc. Books that I am particularly interested in include:
Colloquial Welsh (Colloquial Series) by Gary King
Basic Welsh: A Grammar and Workbook (Grammar Workbooks) by Gary King
Beginner's Welsh: With 2 Audio Cds (Hippocrene Beginner's) by Heini Gruffudd
Teach Yourself Welsh Conversation (3CDs + Guide) (Teach Yourself: Language) by Christine Jones and Kara Lewis
Modern Welsh Dictionary (Welsh and English Edition) by Gary King
Modern Welsh: A Comprehensive Grammar (Comprehensive Grammars) by Gary King
Welsh Learners Dictionary by Heini Gruffudd

Also any books in Welsh would be good!