It is best to have two complete lances.a 'fan' and a turbo.Use quick release fittings and changing them over is simple
You'll need a spanner and a vice ideally as they are put on very tightly.Where are you from?
Maybe these guys can help you ...http://www.adtflex.co.uk/locations.htmMy local guys do this type of thing
Just tell them what you have told us.It's a 1 minute job. (If you have the right tools and you know what you're doing)I bet they'll be open at 8am