Try something like "go fund me" or pitch your business on Shark Tank (Dragon's Den in Canada) Good luck!
How are other automotive parts businesses in your area doing ? If you don't know...you should know. You can easily go visit your competition to see (surface) what they're doing such as their location, advertisements and many other things to compare to what you're doing. Do you have any employees ? What's you bank (location of your business account) make any recommendations ?