I would recommend you to download ObjectBuilder. You can find it on OTLand -> Downloads -> Tools.
When you have that program, load Tibia 9.6 files (for example), go to Outfits, find Drakens or whatever outfit you want -> right click -> export and save somewhere to your computer. Repeat this until you extract all the outfits and items that you need, then close ObjectBuilder.
Open it again, load your 8.54 tibia .dat/.spr file. Go to import -> and import all the files that you exported previously. When all is done, press compile and wait. After compilation is finished, you will get a new .dat and .spr file in the folder you specified. You need to use these files from now on with your client.