The short answer to this one is NO.
Although we do stock 1/4 jack leads within the department, these are specifically part of the PA stock so aren't available for loan and we also only have a few. The leads we have are also either speaker rated or balanced, which makes them unsuitable for use with guitars/amps. In the past we did have some guitar leads but on multiple occasions they got lent out and never came back, we also loaned phono leads with 1/4 adaptors for a time but had the same issue. So policy is that we do not loan out guitar leads.