Manually (type) enter result for variant?

[Gingerweb]

Would it be possible to have a "multi variant" type choice where the customer can manually enter a result?

For instance i have a fabric product which will have the first variant as the colour which is easy to do showing the different images as selected, but the next option is the length of the fabric which can be in multiples of 1 up to 50metres. I dont want to have 50 different choices in the dropdown so i want the customer to type in say 23 and "add to cart" 23 metres of fabric in the colour they want.

Is this possible in VM please and if so how?!
thanks

[GJC Web Design]

the text custom field plugin but to use it as a price definer then I guess either from this discussion

http://forum.virtuemart.net/index.php?topic=140161.0

[Gingerweb]

Thanks - I am after the simplest method obviously as have to hand it over to customer. Neither of them seem to have a demo showing what i need but both claim to be able to do it. Is there an example of yours anywhere you know of?
thanks

[GJC Web Design]

never used either sorry