I'm having a hard time finding brake shoes for 2005 Baja 50 atv. Inside of drum measures 95 mm. Most of the shoes I see for sake are 105 mm or bigger

 

Baja Motorsports have parts books on their website, if your machine is on there, just look the part number up for the shoes and contact them to check if they are in stock. Other alternative is to get your old shoes relined, something of a dying art these days, but I'm sure there are still people who do it.