Geoff Chater (left) of CMAK
and Robert Askew, of Whitefriars, with the shower being fitted in rented homes to make life easier for elderly and disabled people.
CMAK, which has a pounds 2 million turnover, is currently manufacturing 40 shower cubicles a week.
Carl Bentley, business development manager at CMAK, said: "This is the only product of its type in the world.
CMAK, which employs 50 staff, received pounds 19,000 funding from Business Link for the product development stage of the shower cubicles.
The new range of shower cubicles offer an opportunity to both CMAK and the nation's increasing elderly population.
CMAK business development manager Carl Bentley (left) with managing director Geoff Chater (right) and Business Link adviser Harry Balmer
He started CMAK two years ago and has since produced 2,000 adapted versions of the Peugeot 806.
This makes CMAK the second biggest manufacturer of taxis in the UK.
CMAK says, however, that because London is now embroiled in a major revision of minicab regulations, it could be another year before the capital can make a ruling on Eurotaxi is made.
He said that the council had suggested to CMAK that it seek an assessment by a recognised independent group such as TRL, the former Transport Research Laboratory.
CMAK makes the Peugeot Euro Taxi by converting the base Peugeot Expert multi-purpose vehicle.
FUTURE PLANS: Geoff Chater with MEP Michael Cashman AT CMAK in Coventry