Well after doing a little browsing on the net I have come up with this:

They are 95% Cotton 5% ELASTANE and a ladies fit. The cost would be $35 including postage to you (The shop is charging $29.95 to get them printed up).
SO? Let me know what you think OR if you have any suggestions for improvement.
They would be fairly hot to run in being cotton/elastane but I would be happy to run in mine for at least a little while and I would definitely wear it before hand and afterwards.
The shirt is pale blue with Pink writing.
ETA: The shirts are customisable so if you are doing the 10km – you can have 10km instead of half marathon or if you simply want to come and cheer – you can have “CHEER SQUAD” written underneath on the back
OR if you are a boy – you can have blue writing instead of pink and have BLOG GUYS instead of blog girls……the options are limetless and the price doesn’t change