Meade Instruments Coronado PST Case

so how do we get the PST on top of an ET ex now I've got this ET ex 105 which again they don't make anymore then he seemed to make the one two five now as of 2016 anyway how do I get it on the top or to it so I thought well I could use this sometimes I can't use the PST on my main mount in my observatory because in the winter the Sun is so low it just sort of it can't make it can't see the Sun from the top of the shared walls so I thought what I've got the etx let's use the the mound the tracking mound of that so I can sit it up anywhere in the garden and put the PST on top put your piggyback it but the problem is on the ATX 105's didn't make it anymore it's really hard to get accessories now one accessory I think you still can get if you imported from the US is the piggyback bracket that fits around it and the problem is on this model I've got the LNT sitting here so I can't go right b