The PATRONPRE 30% code seems to work on Aldens at kafka.co.uk.
They have a couple sizes of #8 longwings.
Code takes them down to 310gbp shipped to US.
#8 PTB are about 300gbp.
Note that you have to be a "patron" but I think all that means is that you sign up for an account.
Last time I ordered from Kafka they used Fedex. You should NOT owe any duty for US made goods (8.5% for shoes; 4 or 5% for welted footwear) but there's always a chance that something will get messed...