There are also amazons in Carlin, just a bit north east of the city. You can also just check a list of which creature products that are used in common imbues and which of those monsters you can kill and collect the items. Another one would be for example rope belts which you can loot from nomads, there is a nice cave, which unfortunately can be a bit tricky to get access to, in the absolute north of Ankrahmun (up a ramp into the mountain, just east of the passage to Darashia).
You could also do loot bags at several spots around Tibia, one that comes up in my mind is Darashia minotaurs which drops many sellable items at a high frequency.
Last but not least is to buy and sell items on market, for example a thing you could do is to travel to the cities that sells items for the sea routes to Yalahar (piece of royal satin for example) and sell on the market, which usually is on a much higher price than in the shop. You could also put buy offers on creature products that you can sell to NPCs, offers that of course are lower than they are to the NPC and then just sell the items and repeat that process to get a snowball effect.