Hm, I took economics back in college, and it seemed that it was at about this point when the supplier would seek additional capital to increase quantity supplied, as demand seems to warrant it.

Three things would likely happen in this case, a) as more parts hit the market, more potential profit could be realized, b) as more material was needed from the suppliers supplier, bulk prices could be more easily negotiated, and c) those cost savings could be passed on to the end customer.

The net effect would be a higher number of lower cost parts (of equal quality) which would turn otherwise casual interest in the consumer (4x4) market into enthusiastic interest as the part would now be more accessible and financially attainable - further increasing net profit for the supplier through increased demand..

But numbers on paper always look better than real numbers in action. I would be interested to see the size of his operation though, and the cost he incurs per bumper (or part) as he has to deal wit the cost of materials, 4 weeks of labor (or just 4 weeks of waiting which basically equals rent if no other capital expense is thrown at it), and shipping before finally getting a profit. If he's taking the money up front, that to me would further undermine his profit margin as he's not able to dynamically streamline the cost process (say one of his wielders quits, or a steel supplier raises the price of bulk steel after a sale..).