First off, I am the owner of Dive-Logs - so I'm not impartial.
Responding to the last comment posted - yes you should be able to. This is the purpose behind our Log Designer Service.
We have created the world's only on-line bespoke dive log design tool. You can use it to customise the design of your own personal log page, including the page size and units used. There are over 10 million possible combinations so you have a lot of choice!
When you have saved your design we custom print, pack, and post it to you in 3 days.
It's not cheap, this is a premium service that will not suit everyone, but you do get what you pay for - your own unique log book.
We launched this thing less than a year ago and have been a bit amazed by the response - so far there are over 1200 unique designs that have been created by our customers.
It is a very complex javascript application that we have tested in both Firefox and Internet Explorer. Customers who have Macs have also reported it works for them. It is also very graphical as it shows your design in real time as you make your choices so you'd better have broadband.
If you want to try it out:
http://www.dive-logs.com/logdesigner.jsp
Best Regards,
Mike