Band Pass Filter for 435MHz

I have been receiving satellite signals using a simple RTL-SDR V3 and a Directional antenna (Without any type of filter or LNA)

I need to try to assemble an omnidirectional setup, but my access to quality stuff is really complicated (I can't buy anything in the European/North American market without paying at LEAST double the price of the product due to the difficulties imposed by my country)

I have seen that apparently a BPF is ESSENTIAL for my setup, because my SDR suffers a lot from desensitization by other extremely strong transmissions close to my QTH

Well, I have two options :

• Buy something in the Chinese market

Ali BPF

• Assemble a simple DIY BPF

Has any colleague tried this cheap BPF from Aliexpress ??

Does any colleague have tips on how to assemble an LNA+Filter setup with Chinese parts to receive UHF satellites with omni antenna ??

Regarding the antenna, I have a QFH that works, but it suffers from weak satellites

Thanks in advance !!