Many years ago I bought a useful little gizmo ($1.99 or $2.99) that allowed you to set mileage for future events - oil changes, refuelling, etc. It was small 1.5"X1.75" - 7 little rolling wheels to change the numbers - 7 digits. It had a little metal plate with two sided tape to mount on the dash or wherever and a little magnet on the back of the gizmo to attach to the plate. Very useful but sadly broken now. Anyone know where to get these things- can't find them anywhere in Canada, nor on recent trip to the States VA, TN, GA, SC, NC, etc. Tried gas stations, Walmarts, etc. Any sightings would be appreciated. 

Alan Pickersgill
'85 Transporter converted to Westfalia
Ottawa ON
Canada