I agree with David Coleman, it is unlikely that the timing is right to outsorce production.
The challenge you are facing is how do you take a relatively successful product at low volumes and up scale in a way that you develop both value of the business and cash flow and profit required to grow and expand.
Most small business fail not due to poor product or service or even a lack of customer but from a lack of cash flow. The fundamental questions you should be asking at this point are the following....
1) how do I build value into my business to find my growth or attract the right investors.
2) how do I build a brand that can be leveraged and is marketable
3) how can I set up a effective distribution network that allows the business to grow at a manageable (and profitable rate) without negative cash flow challenges that come with growth.
4) what are the key milestones i need to work to and around to be on track for where I want to take the business.
5) what is my pricing model and how do I ensure that this is commercially viable once I do gear up (considering the cost increase that come with this)
I hope these questions help you to design your growth to set you up for real success.
If you would like additional assistance around these, feel free to contact me