We're the UK distributor for Eventide and will always hold stock of Eclipses – most dealers including DV will order units from us as and when customers place orders with them. This is fairly common for premium outboard products with a higher price tag.
DV are quoting early April since they like other dealers will routinely allow a few days to allow orders to get processed at both ends, shipping time, and the fact there is a weekend coming up. Rest assured we have stock and the order will get processed as swiftly as possible. If you have any queries then I'm sure that DV will be happy to assist.