You can buy the foam ones at Shoppers drug mart. Buy a few, try them on yourself first. Also, if your kids are young (not yet teens) i'd put them in for them. Its really hard to get them stuck, but still, with kids, better safe than sorry.
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2002 TiAg M3 6mt
deoranged, dechromed, led tails, ZHP knob, UUC SS v3, GROM, OEM 220M 19's, Michelin Supersports
2006 YZF-R6, black, ohlins, pazzo, BMC, cat delete, vance hines csone, YEC racing tune,-1 +2