yes they are replaceable and available,i have a parts magazine its called," www.************************ ,its a magazine with high performance mods and every part imaginable,on page 215 therre is a complete list of what you need every individual switch is offered,and the complete head unit. switches #36-43 they range in price from $9.99-$21.99 and the most expensive switch is the a/c switch its prices are for brand new and reman,its the most expensive its part of the head unit and can be from $378.99up to$ 1,015.99,the a/c switch is the small round knob that turns up and down for hot and cold,the phone number for the magazine is 1-800-243-1220,you def want to get yourself a copy of the magazine,its got thousands of new and reman parts.also has very high quality brand names such as brembo brake kits,body kits and factory wood interior dress up kits. its very nice it shows detailed pictures of the parts,where they go and it has many more other usefull products and special tools. you can order 24/7,i hope this helps.