Karin had some great suggestions. The 2 I have used are the heel lift and the
straps. In 2004-05 I limped through the 2nd half of the season because of achilles problems. After a long rehab that included wearing specially made boots for both ankles, I was able to start running and reffing again. The therapist fitted me with heel lifts early in the rehab. My doctor directed me to wear an ankle strap which has worked out nicely. He had me perform 2 achilles strengthing exercises. You stand on a raised object (stairs) with just your toes touching the stairs. With your legs 1)bent and 2(straight, you slowly raise and lower yourself up and down 15 times. I was ready for the 05-06 season and it went well. I am still wear the lifts and use the straps every time I officiate or run. The achilles are fine today. The lifts I use are 1/2" ones. Check with a doctor, therapist, or a store that would sell such items. I purchase my straps from an online company. Here is their website:
www.medspec.com/. The product I use is the ASO ankle stablizing strap which comes is black or white.
GOOD LUCK!!