My son's battery in his 96 navigator is in need of replacement and I've ordered one (Renata 371) and thought it might be prudent to change the battery hatch seal as well. Does anyone have info on what size they are and where to obtain them? I read that someone tried Silvermans but didn't get any reply. Imagine Cousin's may have them but without a size I'm a bit stuck. To add the watch is away with him and he will visit late June and would like to get this done at this time.