When I enquire about the price of these modules, I realise that these modules are too costly. The total Bill of Materials cost for the whole product now is of the order of USD10. But a simple DC-DC converter RZ-2405S ( from RECOM : www.recom-international.com) itself costs USD 15. (That is what the local distributor has quoted)

So adding a DC-DC converter ( 3 nos. required in the present context) is obviously going to push the product price very high.
With this we enter the realm of end user price to product volume dilemma. How do you people crack this?

Unless I buy in high volume, price is not going to come down. But product is not saleable at higher price than the present price. So what should one do in such case. Should one compromise on quality, use some home made solution or use a power hogging voltage drop down circuit to some how meet the customer requirement? what is the way out?

Of course the easy way is to tell the customer that solution is not feasible. But is there another way?