I only use Timberbits now, excellent service and price. You've just got to be careful what you spend. Over $80 aussie dollars and its post free by normal air mail and takes about a week and a half. Over £200 aussie dollars and it comes by courier in 3 days. The only snag with this is its the couriers responsibility to collect the import tax so a few days after you get the pens TNT then chase you for about another 25% of the original cost. I now spend roughly $100ad at a time and haven't had a problem since.
Barons and slimlines tend to be my favourite. I made a few propelling pencils but had a problem with the mechanism. Timberbits replaced them no problem and have brought out a new mechanism that fits a sierra and cigar pen so I'm going to give these a try.
keith