I agree with you KnittingNat! I count stitches as well. It may seem slow...but....frogging or tinking back to correct errors REALLY SLOWS UP THE PROGRESS!
Your cabled sweater will turn out beautifully! Stitch markers make it easier and quicker. You will recognize a missing stitch easier. And it makes the "head count" much easier, too. You can "eyeball" the number of stitches inbetween the stitch markers.
I think anyone will ship to any location, except the Moon! I get yarn from the UK, United Kingdom, all the time. I have a favorite Rowan yarn lady who lives there. She ships a lot of her yarn for free! She is an Ebay yarn shop!
You local bead shop will help you with the makings of stitch markers. You need:
1) the head pins
2) the O rings
3) the beads
4) two tools that wrap and nip
If you would like me to take a closeup photo of one of my stitch markers, let me know. I will post it for ya.
I went crazy and made myself about 10 sets of 10. Half of them are on the smallest O rings...for needles sizes up to US5...the other half are a larger size O ring for sizes up to US10.
The silver O rings come in two sizes over here in USA. I wish they came in a super size for needles beyone US10. So, for the larger needles I use plastic stitch markers.